According to Chinese tradition, Laozi lived in the 6th century BCE. Historians variously contend that Laozi is a synthesis of multiple historical figures, that he is a mythical figure, or that he actually lived in the 5th-4th century BCE, concurrent with the Hundred Schools of Thought and Warring States Period. A central figure in Chinese culture, both nobility and common people claim Laozi in their lineage. Throughout history, Laozi's work has been embraced by various anti-authoritarian movements.